A first order reversible reaction Ak2k12R was performed in a liquid-phase batch reactor. When the reaction was run, several samples were taken from the reactor to determine the concentration of A and titrated with a solution of 0.675M in an ampoule containing 52.5mL of sample. The data in the table indicate the titrated volume in different reaction times (CRO=0) : What is the equilibrium constant for the given reaction condition? 1.46 2.70 2.16 8.64 10.8